This library provides an easy way to define command line parsers. Most users
will want to use the System.Console.CmdArgs.Implicit module, whose
documentation contains an example.

System.Console.CmdArgs.Explicit provides a way to write command line
parsers for both single mode programs (most programs) and multiple
mode programs (e.g. darcs or cabal). Parsers are defined by constructing
a data structure.

System.Console.CmdArgs.Implicit provides a way to concisely define
command line parsers, up to three times shorter than getopt. These parsers
are translated into the Explicit data type.